Control Functions
PSI BOX PLUS+ Reference
LOCKOUT.
Sends The Local Lockout Command.
___________
________________________________
or LOCAL LOCKOUT.
___________________
Purpose.
To disable the front panel controls on all IEEE bus
__________
devices.
The LOCKOUT command is used to tell all the bus
devices to ignore their front panel, local, controls and respond
only to the PSI BOX.
The LOCKOUT command or it alternative form LOCAL
LOCKOUT are used to prevent a device from responding to its
own front panel controls. This is necessary when you want the
instrument to be totally under the control of the PSI BOX. It
prevents accidental pushing of the devices buttons interfering
with its operation.
The device will return to local control when it receives the
GTL command via a LOCAL command, or when the IEEE REN
line goes false.
The PSI BOX asserts ATN and becomes the active
controller and sends , then the IEEE command LLO, hex 11h
decimal 17. After the command has been sent the ATN remains
true, PSI BOX is the active controller.
Format.
LOCKOUT or LOCAL LOCKOUT
_________
Params.
None.
_________
Returns.
None.
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Example.
________
_
BUS LOCKOUT
Bus Activity.
___________
_
assert ATN if not already so
LLO
Chapter 8
Page 111
